Clyde Tombaugh at a machine called a Zeiss Blink Comparator, used in the discovery of Pluto. Two glass plates of the same area of the sky were blinked back and forth to look for the movement of objects against the background stars. Tombaugh...

ECW crew transplanting trees in boxes in campgrounds. Photograph from the National Association of Civilian Conservation Corps Alumni Photograph Collection. Materials from this collection may be accessed at the Department of Archives and Special...

Sunflower ECW camp leaders with camp in the background. Photograph from the National Association of Civilian Conservation Corps Alumni Photograph Collection. Materials from this collection may be accessed at the Department of Archives and Special...

This title contains one or more publications. These publications are available in print format from the Arizona State Library and Archives' State Documents collection, beginning with 1867. "The Arizona Crop and Livestock Reporting Service is a...